Overflow 'box' Using Pvc Pipes Only

[nutx]

Hi,

That is the design I'm using to have a surface skimmer.

But I think I saw one website, couldn't locate now, that U-1 should be lower than U-2. Then your tank water will be maintain at level U-2 level.

so your surface skimmer should be higher than U-2.

Hope I'm right.

[idefix]

don't think this will work as air will be able to go in and break the siphon...

[Limpc]

Could you estimate the flow rate it can handle? What brand is your pump? What is the actual flowrate in your setup? (2800 lph pump don't flow 2800 ltrs of water per hour when there's height/resistance)

I intend to make this modification, so it will skim the surface. Comments?

Hi Crab,

My return pump is a Resun. You may be right about the actual performance against the stated spec. I have a ball valve on the return to balance the flow.

I have a skimming feature as well. Pretty much like your idea but much simpler.

Imagine a box inside the tank at the water surface with slots on the top and the pipe intake ###### water from the box.

I will try to take pictures tonight for your reference.

LimPC

[Crab]

don't think this will work as air will be able to go in and break the siphon...

[Limpc]

Hi all,

Here's how I setup my intake. Self explanatory.

LimPC

[PornStar]

same design as the one i have in mind.

btw, where did u get the basket/container with the slits all round?

would it be possible if you provided more close-ups of your overflow sys from different angles?

[Limpc]

same design as the one i have in mind.

btw, where did u get the basket/container with the slits all round?

would it be possible if you provided more close-ups of your overflow sys from different angles?

Hi PornStar (what a name),

Happen to see this box in Diaso in IMM. Kindly of fit the purpose w/o any further modification. But didn't see it recently in the same place.

Picture from different angle ? Will try this weekend.

LimPC

[nutx]

Hi Limpc....you mentioned abt having a ball valve to balance the flow. Can tell me what it is and how it function? is this similar to those float switch?

I dun wan to have a swiming in my room when I start using the sump!

btw, where to buy the ball valve or the float switch?

[PornStar]

Hi PornStar (what a name),

Happen to see this box in Diaso in IMM. Kindly of fit the purpose w/o any further modification. But didn't see it recently in the same place.

Picture from different angle ? Will try this weekend.

LimPC

Thanks Limpc,

Much appreciated.

[yus75]

Hi yus75,

Not too sure which 2 small black vent line you are referring to ? Can point out in the picture ?

The intake pipe is way too low in the main tank. Imagine the return pump malfunction, you will end up with a swimming pool on the outside and fishes dry swimming inside. Do not assume things dun fail. I'm always a strong believer of Murphy's Law.

LimPC

hi limpc......the vent im talkin abt is wat ur pix r showing.......so wat do u use to stick both the vent vale n the pvc........still tinkin of further improvemnt b4 decide to do 1 hehehehe......anyway the pic that got U1 n U2 is so far gd to me......

[ai[k²]wan]

could someone explain why the water level will be at the t-joint..

from my understanding right, the water should be higher, so the siphon can continue..

[Limpc]

Guys,

Here it is ....... Sorry it's a busy day for me.

A little explanation with ref. to the attached picture:

Valve A:

This is for starting of the siphoning action. Plug a air hose on the valve, suck hard, once water starts to flow, shut the valve.

Valve B:

This valve sitting on the end cap and the end cap is not permanently glued onto the pipe. Before ###### valve A, fill this pipe with water thro' this T joint. I cover this with end cap once the siphoning takes place.

Another observation, if I were to shut the valve B tight, the water flow increases. Thus, if I can control the water flow by fine tuning this valve B. It's still under experiment as this strong water flow may sometimes break the siphon.

Maybe, someone can explain this phenomenon scientifically.

That's all, folks.

LimPC

[yus75]

wan,Oct 11 2003, 04:22 PM] could someone explain why the water level will be at the t-joint..

from my understanding right, the water should be higher, so the siphon can continue..

mayb can extend the pipe(a)...........n have the arrow( lower than the tank water level.....perhap tis way will reduce the siphone to take place.......

[yus75]

Guys,

Here it is ....... Sorry it's a busy day for me.

A little explanation with ref. to the attached picture:

Valve A:

This is for starting of the siphoning action. Plug a air hose on the valve, suck hard, once water starts to flow, shut the valve.

Valve B:

This valve sitting on the end cap and the end cap is not permanently glued onto the pipe. Before ###### valve A, fill this pipe with water thro' this T joint. I cover this with end cap once the siphoning takes place.

Another observation, if I were to shut the valve B tight, the water flow increases. Thus, if I can control the water flow by fine tuning this valve B. It's still under experiment as this strong water flow may sometimes break the siphon.

Maybe, someone can explain this phenomenon scientifically.

That's all, folks.

LimPC

bro....how do u fix the 2 valve A n B...??

[ai[k²]wan]

bro limpc what hose did u use to connect the outlet of the overflow..i saw someting like a washing machine hose.. does it fit? and ur tank water is higher than the bottom of the t joint right, this means the website is wrong

[Limpc]

bro....how do u fix the 2 valve A n B...??

Hi,

The metal valve has a threaded end. Drill a 5mm hole, apply silicone on the thread on value and screw it into the hole in the pipe.

For the green valve, drill a 5mm hole on the end cap, apply some superglue on the valve and the hole, push the valve in.

Hope above helps.

LimPC

[yus75]

bro....how do u fix the 2 valve A n B...??

Hi,

The metal valve has a threaded end. Drill a 5mm hole, apply silicone on the thread on value and screw it into the hole in the pipe.

For the green valve, drill a 5mm hole on the end cap, apply some superglue on the valve and the hole, push the valve in.

Hope above helps.

LimPC

[ai[k²]wan]

lim,

did u make ur pipe go all the way into the main tank like the one in the pic?

[FuEl]

There is no real need for valve B...as long as your return pump is not overpowered...the whole siphon effect will be maintained in the U turn section...and water will simply flow down the T joint and into the sump by gravity. Self Regulatory... IMO it would be easier to leave valve B out..and have a total opening instead. The water level at the T joint will always be the same water level as your main tank.

However...if your pump is indeed overpowered...naturally the open end of the T joint will overflow.

[Limpc]

wan,Oct 11 2003, 11:38 PM] lim,

did u make ur pipe go all the way into the main tank like the one in the pic?

No. I have a inner box inside the tank and the intake pipe is about half inch above the box of that box.

LimPC

[Limpc]

There is no real need for valve B...as long as your return pump is not overpowered...the whole siphon effect will be maintained in the U turn section...and water will simply flow down the T joint and into the sump by gravity. Self Regulatory... IMO it would be easier to leave valve B out..and have a total opening instead. The water level at the T joint will always be the same water level as your main tank.

However...if your pump is indeed overpowered...naturally the open end of the T joint will overflow.

Thanks, FuEL.

After a couple of unsuccessful attempt, I will valve B open, to be on the safe side.

Very please with this concept. Will implement the same to my main tank during the december period.

LimPC

[ai[k²]wan]

how did the water work its way up the tube from the part in red? isn't the siphon susposed to go down ?

[ai[k²]wan]

oh i think it is bcause the water is higher at the 2nd bend is it?

[Limpc]

think so, too.

Remember decades ago in school .... something about water finding its own level ....

LimPC

[yus75]

wan,Oct 12 2003, 10:47 PM]

how did the water work its way up the tube from the part in red? isn't the siphon susposed to go down ?

as long i tink the arrow b lower than the water level in the main tank shld be fine i guess.....